Charge-vortex interplay in a superconducting Coulomb-blockaded island

Research output: Contribution to journalArticle

Details

Original languageEnglish
Article number020501
Pages (from-to)1-5
Number of pages5
JournalPHYSICAL REVIEW B
Volume92
Issue number2
StatePublished - 6 Jul 2015
MoE publication typeA1 Journal article-refereed

Researchers

Research units

  • RAS
  • ETH Zurich
  • VTT MIKES Metrology
  • Nizhny Novgorod State University

Abstract

We show that charge transfer through a small superconducting (S) island of a single-electron transistor is strongly affected by vorticity. This interplay of charge and rotational degrees of freedom in a mesoscopic superconductor occurs through the effect of vorticity on the quantum mechanical spectrum of electron-hole excitations. The subgap quasiparticle levels in vortices can host an extra electron, thus suppressing the so-called parity effect in the S island. We propose to measure the collective dynamics of vorticity and electric charge via the charge pumping effect caused by alternating vortex entry and exit controlled by a periodic magnetic field.

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